Rotary cap having sealing material flowed thereinto



May 19, 1931. MMER I 1,805,623

ROTARY CAP HAVING SEALING MATERIAL FLOWED THEREINTO Filed Dec. I 21, 1928 'Patente d May 19, 1931 UNITED STATES PATENT OFFICE CHARLES HAMMER, OF HOLLIS COURT BOULEVARD, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ANCHOR CAP & CLOSURE CORPORATION, 0]? LONG ISLAND CITY, NEW YORK, A CORPORATION OF NEW YORK RorARY cAr HAVING SEALING MATERIAL FLOWED THEREINTO Application filed December 21, 192$. Serial No. 327,602.

The present invention relates to closures or caps for containers, and more particularly to rotary caps adapted for'the hermeticallysealing of glass containers.

' Heretofore it has been the practice to provide rotary caps, either with a separate liner plate or a ring formed gasket. These forms of vacuum-sealing material required a com.- paratively thick material to preserve its shape, which materially increased the cost of the cap. As there was no way to lock such separable sealing members in place; consequently after the container was sealed, it was necessary to retighten the cap by giving it a further turn-on in order to efliciently, clamp the cap onto the container. In other words, after the sealing material and cap had been applied to the container and the cap vacuumsealed, it was found that the cap was loose A becauseit would not hold and would wrinkle and this required the further turning of the cap onto the container efliciently to clamp the cap on the sealing-material. This required considerable time and therefore increased the expense, and furthermore, there Were times 'when the cap wasnot thoroughly tightened by this subsequent turning operation andconsequently the container was not tightly sealed. I i

Attempts have been. made to pour sealing material into caps with more or less success, but experiments have disclosed that this mode of applyingiahe sealing material toga rotary cap is not successful because on the rotation of the cap, the sealing material wrinkles and prevents the efficient sealing of the contain- .er. fact I was iadvise'd that it"was'not ossible to use a fluid sealing material flowed Into the 'capwhenthat cap was a rotary cap and therefor interfere with the efficient seal: -ing of'the conta' ner. But fbyiea'son of the present improvement, I have made it? pos-'' sible' to use such a, sealing material in lrotar'y caps tosu ch an extent that many' hundred" thousand of these caps have been successfully;

'manufactured and;us e'd,' and it is now claimed by many prominent packers that itfii srthe-l I best} -yacu1'1m"-sea;led .YICZIPLZGZGI placed: on; themaifket, and thjerfore Izbelieve ;,th-a t {.1 ani the first to provide a practical :andcommer form a hermetic seal when applied upon a cial rotary type of cap withsealing material flowed thereinto,since by this improvement, the sealing material is so securely held' within the cap that the rotation thereof to thefullest extent in the first instance does not afiect either the position or the condition of the sealing material or cause it to move relatively to the cap.

An. object of the invention is to provide an inexpensive rotary cap wit-h an improved sealing material secured therein practically integral with the cap.

Another object-of the invention is to decrease the cost of a cap' adapted to form a hermetic seal by reducing the amount of sealing material without impairing or decreas ing the effectiveness of theisealr Another object of. the invention is to proyide a successful commercial rotary cap havmg a small quantity of sealing material flowed thereinto which will not wrinkle upon rotating the cap about the container.

Another object of the invention is to provide an improved closure cap with a recessed annular band havlng sealing material flowed .thereinto and said band having a grooved vide an-eificient rotary cap'having a layer of sealing material flowed therein which will container. 1 A further object of the inventionis to provide a rotary cap with a-sealing layer that will prevent the'cap from-accidental rotatlon after oncebeing applied, thereby eliminating th'e'necessity of re-tighteningthe cap.

prevent, the loss-. -of the-contentsby spilling A; OISPO lllIIgI' f A still furtherobject of the invention is" to provide asrotany'. sealing :cap withwsealing- A material flowed thereinto which is.-;adapted to be used-"tol'reclose ihe receptacle. tightly to.

Otherand further objects of Will .'he1objvious upon an understandingcof lithe illustrativeembodiment about/ te bede- I t scribed;- 0r-will ,zbe indicated: in ;the zappengledi 2 claims, and various advantages not referred to herein will occur to one skilled in the art tice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawings, forming a part of the specification, wherein Fig. 1 is a top view of the cap;

Fig. 2 is an interior view of the cap with the sealing material applied thereto;

Fig. 3 is a cross-sectional view of the cap shown in Fig. 2;

Fig. 4 is a View of the under or rear side of the sealing material; and

Fig. 5 is a cross-sectional view thereof, enlarged;

Similar characters of reference indicate corresponding parts in the several views.

Before explainin in detail the present imrovement and mo e of operation thereof, I

esire to have it understood that the invention is not limited to the details of construction and arran ement of parts which are illustrated in t e accompanying drawings, since the invention is capable of other embodiments, and that the phraseology which I employ is for the purpose of description and not of limitation.

This improved cap, which is shown of metal; ma comprise a top 2, having a depending s irt 3 provided with a strengthened or re-enforced lower edge 4, usually obtained by curling or beading the lower edge.

This lower ed e isplrovided with locking lugs 5 formed rom e bead, these lugs being shown as arc-sha ed. The skirt is also rovided with re-en orcing corrugations 6 which together with the bead assist materially in strengthening the skirt of the cap, while these corrugations also provide a hand grip and efiicient means for the rotation of the cap on the forming rolls. The top of the cap is provided with a panel shown as of concavo-convex form terminating at its outer edge in a tapered or inclined surface 8 formin' therebetween and the skirt an annular c annel, recess or groove 9- of relatively wide dimensions and of suflicient width to receive therein the sealing material according to the width thereof to used.

It has been found, however, that the sealing material poured into a rotary cap wrinkles, becomes dislocated and interferes with the proper sealing of the container on the rotation of the cap. To avoid this,

wardly or upwardly ing groove 10, of less width than the annular recess or groove 9, terminating adjacent to I provide the cap with an annular, outextending rib formthe skirt in an annular shoulder 9'. Heretm fore it has been the practice to form the cap with an annular projection or rib extending downwardly or into the cap for the purpose of engaging the sealing material immediately over the mouth of the container. In the present improvement, however, this annular rib forming groove extends upwardly and is wedge formed.

In practice the sealing material 11, which is called compo, is poured into the cap in a fluid condition and permitted to flow into the relatively wide groove 9 where itv forms a ring and sets, and by reason of its adherent character and the locking rib groove 10 it is efficiently held in the cap so that it is practically integral therewith, the setting of the material causing it to conform to the shape of the two grooves so that the sealing material thus has an interlocking rib 12, as

shownin Fig. 5, projecting into the smaller groove lO'which acts to hold the compo from moving laterally or Wrinklin whenthe cap is firmly turned down by mac inery onto the container. The use of compo material for sealing the container is very, much more advantageous than an ordinary ring gasket or liner plate or any'other form of gasket so far known, by reason of the fact that it can be relatively thin so that a small quantity will efliciently accomplish the purpose desired, thus materially reducin theexpense while at the same time it more eihciently seals the container and also prevents as hereinbefore stated the necessity of retightening the cap after it has once been applied, thereby reducing the labor-cost. I It will be observed that the inclined part 8 and the inner skirt wall 3 together with the locking groove '10 which has a depth substantially equal to Asvarious changes may be made in the form, construction and arrangement of the parts herein without departlng from the spirit of the invention, it is to be understood that all matter herein is to be interpreted as illustrative and not in a limiting sense.

Having thus explained the nature of my said invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, I claim:

1. A sealing cap comprising a cover part, a depending skirt, a plurality of concentric grooves in the cover portion ofsaid cap,--and sealing material common to said grooves, said grooves co-operatin with each other to hold the sealing materia in position.

2. A rotary vacuum sealing cap compris ing a cover part, a depending skirt, a plurality of concentric grooves in the cover portion of said cap, and sealing material flowed into said grooves, said grooves co-operating with each other to hold the sealing material in position.

3. A rotary vacuum cap comprising a cover portion, a depending skirt, an annular groove in the cover portion of the cap adapted to receive sealing material, said groove having a portion of the bottom thereof de pressed to receive the sealing material and to hold it in position in said groove, and sealing material flowed into said groove and into said depressed part.

4. A rotary vacuum sealing cap provided with an annular groove adapted to receive sealing material, an auxiliary groove within said annular groove, and sealing material flowed into said grooves and held in position thereby.

5. In a rotary vacuum sealing cap, the combination of a cover portion, a depending skirt, an annular groove adjacent the outer periphery of said cover portion for holding sealing material adapted to engage; the rim of a container, an auxiliary groove within said annular groove and located adjacent the outer edge thereof, and sealing material flowed into said groove and held against displacement thereby.

6. A vacuum-sealing cap having an annular groove, provided within the same with an annular groove of less width, and a sealing compound flowed into said grooves and adhering to the top and interlocked therewith against shifting movement within the cap, whereby the cap may be tightened down without injury to the sealing compound.

A vacuum-sealing rotary cap having its top provided with an annular recess of relatively wide dimension and within the same a relatively narrow groove projecting outwardly therefrom and located adjacent to the skirt of the cap, and a sealing compound flowed into said grooves and adhering to the top and so interlocked therewith against shifting movement relatively to the top whereby the cap may be tightened without injuring the sealing compound.

8. A vacuum-sealing cap comprising a top and a skirt, said top having an inwardly projecting panel forming a relatively wide annular recess having its top wall provided with a groove of relatively narrowwidth, and a sealing material flowed into said recess and groove and locked against shifting thereby with its sealing 'face substantially flush with the inner face of the panel.

9. A vacuum-sealing rotary cap comprising a top and a skirt, said top having an inwardly projecting panel forming a relatively wide annular recess having a beveled or inclined side wall and having its top wall pro- 1 flowed into said recess and groove and locked agalnst shifting thereby with its sealing face substantially flush with the inner face of the panel.

11. A vacuum-sealing rotary cap comprising a top and a depending skirt, said top having an inwardly projecting panel provided with an inclined side wall forming with the skirt an annular recess, the top of said recess having an outwardly projecting annular rib forming groove connected with the skirt by a shoulder, and a sealing material flowed into said recess and groove and so adhering to the cap and locked within the recess and groove as to permit the cap to be tightened down without thewrinkling or dislocation of said sealing material.

12. A vacuum-sealing rotary cap comprising a top and a depending skirt, having corrugations and a curled bead provided with inwardly projecting locking lugs, said top having an inwardly projecting panel provided with an inclined side wall forming with the skirt an annular recess, the top of said recess having an outwardly projecting annular rib forming groove connected with the skirt by a shoulder, and a sealing material flowed into said recess and groove and so adhering to the cap and locked within the recess and groove as to permit the cap to be tightened down without the wrinkling or dislocation of said sealing material.

13. A closure cap adapted to form at hermetic seal with a glass container, comprising a top and a skirt, said top having a relatively wide, annular channel adjacent the periphery thereof, an auxiliary groove substantially centrally disposed with respect to said channel, and sealing material flowed into said channel and into said groove whereby it is firmly locked in position.

14.-. As an article of manufacture, a vacuum cap adapted to form a hermetic seal with a glass container, comprising a top and a skirt, said top having an upwardly extending annular groove adapted to receive sealing material, certain portions of said groove being substantially'deeper than other portions thereof,

, and sealing material flowed into said cap and 15. As an article of manufacture, a screw cap adapted to form a hermetic seal on a glass container, comprising a top and a skirt, said top having a groove therein adjacent its periphery to receive sealing material for engaging with the rim of a glass container, and means comprising deformation of the metal in the bottom of said groove adapted to receive the sealing material flowed into the groove and also adapted to cooperate with the groove to hold the sealing material in position, and sealing material flowed into said groove.

Signed at Brooklyn, N. Y., this 19th day of December, 1928.

CHARLES HAMMER. 

